---
kind: "section"
citation: "40 C.F.R. § 141.530"
title: "40"
number: "141.530"
heading: "What is a disinfection profile and who must develop one?"
url: "https://uscodex.org/cfr/40/141.530"
---

# §141.530. What is a disinfection profile and who must develop one?


A disinfection profile is a graphical representation of your system's level of Giardia lamblia or virus inactivation measured during the course of a year. If you are a [subpart H](/cfr/40/subpartH.md) community or non-transient non-community water system which serves fewer than 10,000 persons, your system must develop a disinfection profile unless your State determines that your system's profile is unnecessary. Your State may approve the use of a more representative data set for disinfection profiling than the data set required under [§§ 141.532-141.536](/cfr/40/141.532-141.536.md).


## Notes

### Amendments

[67 FR 1839, Jan. 14, 2002, as amended at 69 FR 38856, June 29, 2004]

### Source

Source: 67 FR 1839, Jan. 14, 2002, unless otherwise noted.

### Authority

Authority: 42 U.S.C. 300f, 300g-1, 300g-2, 300g-3, 300g-4, 300g-5, 300g-6, 300j-4, 300j-9, and 300j-11.

### Source

Source: 40 FR 59570, Dec. 24, 1975, unless otherwise noted.

### Amendments

[67 FR 1839, Jan. 14, 2002, as amended at 69 FR 38856, June 29, 2004]